Manuals > Device Connection Guide > Mitsubishi Electric > Open Protocol (RS-232C) > Q/L/ iQ-R Series

overview

This is a setting example for connecting to the iQ-R series via RS-232C. The iQ-R series cannot be configured with GX-Developer, so GX-Works3 is used.

Model used

item	Model etc.
PLC	R08CPU
Communication Unit	RJ71C24

Configuration environment

item	environment
OS	Windows8 Professional 64Bit
tool	GX-Works3 Ver1.000A

Configuration details

item	setting	Setting items	Configuration Example
PLC side settings	Set with tools	Communication protocol settings	MC Protocol (Format 1)
		Communication speed settings	19200bps
		Operational Settings	Independence
		Data bits	7
		Parity Bit	can be
		Odd/Even Parity	Even
		Stop bits	1
		Sum Check Code	can be
		RUN Writing	permission
		Station number setting	0
PC settings	Unit Settings	COMPort	Communication port number to connect to
		Transmission speed	19200bps
		Byte Size	7bits
		Stop bits	1bits
		parity	Even
		Sum Check	can be
		protocol	Format 1
	Folder and communication test settings	Area code	0
		Network Number	0
		PC Number	FF
		Request unit I/O number	3FF
		Request destination unit station number	0
		Your number	0

* Most of the settings on the computer will be adjusted to match the settings on the unit.

PLC side settings

Set to "R08CPU". Settings are done using GX-Works3 etc.

1.Start GX- Works3 and create a new project.

2.Open the menu "Online" - "Connection Destination" and confirm that you can communicate with PLC.

3.Double-click "Parameter" - "Unit Information" - "Name of the unit to be connected (R08CPU in this example)" - "Unit Parameters" in the navigation tree and set the parameters as follows:
c_plc_0069 c_plc_0070

setting	Setting contents
Communication protocol settings	MC Protocol (Format 1)
Communication speed settings	19200bps
Operational Settings	Independence
Data bits	7
Parity Bit	can be
Odd/Even Parity	Even
Stop bits	1
Sum Check Code	can be
RUN Writing	permission
Change settings	Prohibited
Station number setting	0

4.Write the parameters to the PLC by selecting "Online" - "Write to PLC" from the menu.
c_plc_0071

After setting the parameters, you must turn off the power to the PLC once to reflect the settings. Although a remote reset may be possible from the tool, we recommend turning off the power once to ensure that the settings are reflected.

PC settings

Use the Server application to connect to the PLC for which you have set up communications.

1.Right-click "Application" - "Driver" in the tree and select Add Driver.

2.Select the following units from the displayed driver list and add them:
c_plc_0062

3.Open the properties of the added unit (U01) and click Communication Settings.
c_plc_0063

4.Set "Communication Settings" as follows:
c_plc_0064

setting	Setting contents
COMPort	Communication port number to connect to
Transmission speed	19200
Byte Size	7bits
Stop bits	1bits
parity	Even

5.Open "Other settings" and set it as follows:
c_plc_0065

setting	Setting contents
Sum Check	Check it
protocol	Format 1

6.USB-RS-If you are using a 232C conversion cable, the COM port may be locked in the event of a communication error, so check the reopen setting.
c_plc_0068

7.Perform a connection test to check the connection
c_plc_0067

If a message such as "Connection OK" is displayed, the connection is confirmed to be OK.

Connection example [iQ-R series]

Connection example [iQ-R series]